Bruno wesselmann



(No Model.)

B. WBSSE-LMANN. METAL SHEARING MACHINE.

No. 600,465. Patented Mar. 8, 1898.

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UNrn STATES ArnNr rricn.

BRUNO VESSELMANN, OF GTTINGEN, GERMANY.V

METAL-SHEARING MACHINE.

SPECIFICATION forming part of Letters Patent No 600,465, dated March 8,1898.

Application led October 7, 1897.

To all whom t may concern:

Be it known that I, BRUNO WEssELMANN, a subject of the King ofIrussia,Emperor of Germany, residing at Gttingen, 54 Friedlander Veg, in theProvince of Hanover, Kingdom of Prussia, Germany, have invented new anduseful Improvements in llIetal-Shearing Machines with Eccentric Pivotfor the Blade, of which the following is a specication.

In order to facilitate commencement of the cutting operation and preventpushing aside of the material inserted between the shearinglimbs, themovable blade or limb, according to the present invention, turns on aneccentric pivot, which is turned by the hand-lever actuating' the uppershearing-limb before said lever effects a downward motion of the frontend of said limb. By reason of this partial rotation tlie rear end ofthe limb or blade moves vertically before the hand-lever actuates theblade itself, so that the shearing can be commenced with more facility,and forward displacement of the work cannot take place.

On the accompanying drawings, Figure l shows a side view of the newmetal-shearing machine. Fig. 2 is a plan view of same; Fig. 3, avertical section on the line x m, Fig. l.4

The upper blade a turns on an eccentric pivot b' and is connected withthe hand-lever 72, by the link g. In order to give the upper blade orlimb a at the commencement of the shearing operation a verticallydownward movement at the rear end first, there is in the link g, whichforms the connection between lever h and limb a, a slot c', in whichslides the pin or bolt m of the lever, thus affording free play for thelatter when it is brought from the raised position into the dotted-lineposition h', Fig. l. The pivot l) of the upper limb is further connectedto the hand-lever by means of a joint mechanism c cl,which gives thepivot bduring the movement of the lever from the position shown in fulllines to that shown in dotted lines a certain advance, whereby theeccentric b of the pivot on which the shearing-limb turns eects adownward movement of the rear end of the latter. Since this movement inthe direction of the arrow, Fig. l, acts nearly vertically on thematerial to be out, inserted between the stationary shearing-limbf andthe upper shearing-limb a, a forward displacement of the said materialcannot take Serial No. 654,445. (No model.)

place. Furthermore, the motion of the blade obtained is the mostadvantageous for commencing shearing, and by means of the levermechanism and the action of the eccentric is effected with much greaterforce than in the case of direct-acting shears.

I-Iaving now fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. In a metal-shearing machine, the combination with a stationary blade,of an eccentric rotating pivot, a movable blade fulcrumed at its rearend on said pivot and adapted to turn thereon as a center, a lever foroscillating said blade about its pivot to make a shear cut, and meansoperated by the lever during the commencement of the shearing operationfor rotating the eccentric pivot in its bearings to shift the fulcrum ofthe movable blade and give to the rear end an approximately verticalmovement, substantially as described.

2. In a metal-shearing machine, the combination with a stationary blade,of a movable blade journaled at one end on an eccentric pivot, a leverprovided with a pin, a slotted link pivoted at one end to the movableblade and engaging the pin on said lever thereby permitting alimitedamount of lost motion between the lever and blade, and connectionsbetween the eccentric pivot and lever for rotating said eccentric in theblade to give the latter an approximately vertical movement during theinitial part of the shearing operation, substantially as described.

3. In a metal-shearing machine, the combination with a stationary blade,of a movable blade journaled at one end on an eccentric pivot, a leverprovided with a pin, a slotted link pivoted at one end to the movableblade and engaging the pin on said lever thereby permitting a limitedamount of lost motion between the lever and blade, and adjustable linkmechanism connect-ing the eccentric pivot with said lever, substantiallyas described and for the purpose specified.

In. testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

BRUNO W ESSELMANN. lVitnesses:

WALDEMAR HAUPT, HENRY HAsPnR.

